<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
    *{margin:0;padding:0;}
    img{
        width:230px;
        padding:5px;
        vertical-align: bottom;
    }
    #container{
        position: relative;
        margin-left: auto;
        margin-right: auto;
    }
    .content{
        width:240px;
        float: left;
        position: relative;
    }
    </style>
</head>
<body>
    <div id="container">
        <div class="content">
            <img src="images/01.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/02.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/03.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/04.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/05.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/06.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/07.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/08.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/09.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/10.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/11.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/12.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/01.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/03.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/04.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/05.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/07.jpg" alt="">
        </div>
        <div class="content">
            <img src="images/09.jpg" alt="">
        </div>
    </div>
</body>
</html>